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Other Noncurrent Assets, Net - Summary of Other Assets (Detail) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Dec. 31, 2012
Goodwill And Intangible Assets Disclosure [Abstract]    
Assets held for sale $ 430 $ 1,965
Restricted cash 1,688 1,694
Other 137 195
Total $ 2,255 $ 3,854